Marina & The Diamonds and Charli XCX have recorded a song together.
That song is called 'Just Desserts' and as well as being very good it's also available as a free download from here.
You can listen to it below before you decide whether or not its worth space in your iTunes library.
They should do more songs together shouldn't they. Maybe as part of a girlband.
[youtube]cohU-_F6hZA[/youtube]